Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c3aefdfa7fe6a97aef72a1ce297a416ea74cfe4ccd5255ebfd2fbbfcba41ee33' 
  AND token = '5yMGqBMMPeTDUCnqw0zUjNq6DJOyMjchlw0a+aPXbgM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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