Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a0e59953428d142c6be750af22bbbea12a06d4bc2546b2c6b2ee67639203c7be' 
  AND token = 'EolTkg6NL3FPtVD2/x8sPxNqzdLmy7dWY0SaZYEXdcg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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