Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '431ed70e37d8f9578e218cc1c42278850ffa6bf9929ad601416368f2233ad590' 
  AND token = 'R0ofxQ0W1iiyDQQBe3E3Bz97ziHem8mhzWzskR8b26k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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