Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5e869a1bd6349c36bddee080971cef46a77ccb4616cd059e88249d33d0fa226b' 
  AND token = 'XmdDHSgCViz/Na0jPlc1dG+YW9sqsx7HEoZcchEoQyE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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