Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'efe4f0a09f41e68d60dc0684c1196378e3c80ff4035c3c34fc5004b47c383920' 
  AND token = 'oWnVzm7wb47uupakyHzzLxfyExkjVSag+lgEYwwcY8Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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