Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7174e18ecb8e8a85549de8ece787774cc843c1cdf3e9ce8af353d1312c11dd74' 
  AND token = 'Xd9AR1q6NKRWM8H2m0oQurE59pZnzCtgn8UXm/RUlgI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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