Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1a0a749b9567f2ed7739bd66436447eab3c2ea16811aa62fd6c73b0f6a0b8897' 
  AND token = '241M4H4GFF8ZKRkpk1Z0vOm9y3tpgLGyV2OZB4l0OIs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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