Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95ab21721880f9a60473799854d6106e72418ade3486709598ee2674cb742d02' 
  AND token = 'JMWhCH38lIj/pDmoM/r8O8fSjkr3epqblaGSHTvRAh4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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