Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4fbf0f89403ef88c10b0befa9119a0c7522634a0dce81bafd0b1ddc08b218318' 
  AND token = 'F/x93QRCJSWiveMR4XxNJZ+7gfi2lggMxhA1Pr+YK/M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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