Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5f8f99b2cc9888c4be5a8c9a1a1aa08e4714e73a0558ff53796660082f2f1202' 
  AND token = 'RefKtIUDE7wD0quI2YPNPuxHwiBV6VfoQJnIEQ5PgwE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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