SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '063c58071bd27d2e4fec0f5f23b5f3db365706e5fb47be84a2c7e000de1dab46' 
  AND token = 'NPHjzY/hpvgmGyXu1nkEdUl44G+3JdymrXDA9CRsBLA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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