Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '26a1e4187e400bb1477a0a5f9dc32b4dd47640bde2ab5f7b8354a36ec3d77649' 
  AND token = '7teoWHwz/sccFkmHY9zlmd6p2c0qpfjq5afatxH8H54=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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