Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6169d7e5e37c03c2947158a40246e7a3a6864fb009f34bde0486a440ecdf5405' 
  AND token = 'C6Dap/pVFt5xn1b0UnZOrjrmhHdrlmBurBWfBIfMhFs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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