Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0abab4e4b97a41aa0876cf52ff410d96e74ba25d9215c565bd7bf15f295a8b7d' 
  AND token = 'LtVpBb9rrfpJ9LBXMjX0BTPcDtCM/cm1RawhsgM8Go4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

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