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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'f1dd834ee32f6ba55c17a13914e24cfd7183140163f87c30d862face7777da42' 
  AND token = 'sJqD0JzjD2l6pYVci6OuA12ZBaPy++d8LmamyBUblXI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00007

JSON explain

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