Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '12004879ccd0100efe301639b51595150da8333d9b2c3f4e33c445b4196a3dd7' 
  AND token = 'xn98E3Oz+1LYLwy0yTJ4Yv9nwWCJIqEidS8WdhaxFgM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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