Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '56c273b9ca1a70de32f6823259e1815ff9a12cc21d72754d837ff69eafa14ab7' 
  AND token = '1XSPEGb3PNaRajO5c5fNSrmRZo9d/lK4y0L+Bq2uzQw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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