SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9218f40a2064c67e9230eb08bd05bf3dbf2fcbe7e501d1f6a31ded4a950c4ae5' 
  AND token = 'iL5xyMtWUkosBZ3vDC28JhXuBdJBO6QFz+jNSyfGYAg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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