Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bb6a0854dd811bc52f8ba8cb63a0b5ad8f1f39e83775e327d066aeffad28edee' 
  AND token = 'h+t4XxOXZiybGxv2IqIcRPlBvB429W1Azr+at+FnLTs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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