Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1622a5ad22490fec30de4eac84301b8a5c3ca20239cad651d9b7cb0cbfe8608a' 
  AND token = 'mdrhFskGjC79oz3S7Dm0W7aHFpsGGT0LMXUYcOj/VPc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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