SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '35b11f3805589213cba0f6c2e1daa00b06ef06897774948d40f41b1dc4355ae4' 
  AND token = '96E5SC0pAc9kp8x4YfXO0dJv1qzzBw6jG/rlFiXvwjc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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