Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3f6043203e30abb2e5078dfa744845228958f8d27b9f9d76ba15fc48bbe185d0' 
  AND token = 'fkgxAfoBFRUJjxheFfbyYpA7zkLNpaOS/y6X4vjK1i4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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