Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '467e5a74faef47b84f4bc3e6696ea20844831f1d6183b000bf7846772603f89a' 
  AND token = 'dH8lkj4pMLwNRVXRWrTGsXb+Xc1dcKvEasO+1Q4D4Zc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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