Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e5e19a0ddc270b07107b9a413d13f9c995d882626daa309f8549749b8b1637f2' 
  AND token = 'yg7+x2UOmbSgcLjqmS3kiLVXYBurz0VsdceIAHHiRxo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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