Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0e4a6ddbc5fdfba8397b727ce7eae8f17ea85c3339ab287d1e977ab766e2050f' 
  AND token = '4U06uN9QyFWZ0Pk7uJAaSuKo+UjaW8vBR/A2VExT1q0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00059

JSON explain

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