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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'c1e738464674e6dd0657d32b5355bd0a384b46e1efb1558bce9bed2ebb3bd6aa' 
  AND token = '7IqxcPcs6dDl+pH2d6G/xqYR5WYXUFYeuhNKJjAA+zs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}