SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bd606dda0b70fcc53b15c2dab28f54f7f8d1696067e91384e19dc77cab3dcb9c' 
  AND token = 'veG2wnTKjqtRzOPJWIEmpKdgWOz/9tWBUfrXJ95oyHY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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