SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '794daf0161c445e5b2f006ef4e2ae71332ef67957bfbf41e491aa81d9b20671a' 
  AND token = 'R/+LCt8sgh4VHEZzg96lp9+yBTl6vzuJjjuHtav4M1U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}