Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fb560438cf50ca39307660c9c1a6d44153b679f65e9692d9b5a02125e756ea5c' 
  AND token = '88elEJAQMX1q4nmScBy5ixF9RRMR7SW+k1oTTMlpVEc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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