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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '82f1c29ab5c4bf3a213dc1bf3c0a6f70b633e9f91888f5907de1df88c1e65259' 
  AND token = 'sdTX5+pEehJJ7pT2QjEGnwgAA0RP2Ffpao3moW28l+I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}