Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b5bc8529970e3c05ddbbacf9ce502e3d16598c1a5a23caa2ceeee26bf593818d' 
  AND token = '3YPs/vJn3xjS5cipyduPinNCJxMGlkaS/e30B5ueAos=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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