Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'da33e93ea0fdf9f342b0619beed5f99ecc2f2f43da9bce93936cf20bf4472a25' 
  AND token = 'TeEL7nTz8MGUL2V42ryETYiLT3eS/eZNHP/v0g2MENg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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