Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd974b4830a1a3d4fe6de5467c06e048287d7d77668c1ee8cd1c6aa21c7328165' 
  AND token = '6Ww5a5Vrjy+864fNX9BpNgCShv2ED5sWT7pEyWJKehs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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