Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f46baf839da96d46b4fbba207c95845fdd1e03d0dcbeebd9d3d180c87ceefe10' 
  AND token = 'I/ZMCpvcjqNNfaqUGxcprXUeHvUlDwAXSiFhIIesz20=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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