Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '52ce9e3c725192390f1fae3c006e76028220170fc8724ff979371080696ff65e' 
  AND token = 'Rki5/TQ5Z0KdISp1JrRzmrgUSBQX1efapawLFpkJl4Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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