Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b6244f4255d97ed94b2ccf71f8f77f8c0a4596bccde86149b6341211552b54e5' 
  AND token = '1ReCFco1AY8dGiCkae1fDembRRbkkF05WNgMIS29epA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00055

JSON explain

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