Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4f9056abdc54c27bf1ef3a3f501feec42ff749f7ce4a72dd60912387c7ffbf87' 
  AND token = 'pbybL7kTiUE5Y28idoJPxToviT1GhIul1ru9wrCqIfA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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