Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '67be52925ace4920a6be882ea7562bf5b0b342255b4408be2b6e93da2d180367' 
  AND token = 'qthD7i1dFvfG09v7wdxTiU141V6RkbUX1YIrX33TpR8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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