Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b1a2e877d4d08bea47431ebc5e03e5247c28772c5bda8752fcbd954618b6ac26' 
  AND token = 'qZA7zIo6L/U0h8Q0tRzRed1cfrFkZngJNAH8aIGxE48=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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