Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0a7e9577b5016630a66db26367cb998d526b541e90e589830a79e5f0a0603c56' 
  AND token = 'Th7bu9KtKG3T+25QB9Eb2dmU5x7XCkxZ4UCRuWsc25A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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