Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c27f2adf1dd79b29c7781acb49def1470231fa3324fc414aaf8c64f70253dc62' 
  AND token = 'EzjhnZ07j6c3b4VdCaAyAnEONsmlfdpfEGBc/7Gauzo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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