Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7c56e7b291b79ea8fa803984df61f4673a63f736a51737d2a30d36e3b42ba1be' 
  AND token = 'np21K5EzCcbI+DCh+uUAib/1AHyt2R2EkC4wEeDAfpA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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