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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '8686703306e1a7d98899c5fd07bfde13e818f4d1640b247f474b6e6050001911' 
  AND token = 'oWoYUW57sX+tfFryo183UoURbKksSBI/meHE5bRPOLU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

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