Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e53493939ee5aaf873e166fab592b5d2c465716986f50ed51a33cc207da0e913' 
  AND token = 'BwZwNVQO9967P34TrpL3bP/CeBtEC1VObJVLFNL4mFI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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