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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bebab8f3f3eb65bcddcf662c22f61f6e57f5a641365f661ddcea8d01cfb8250f' 
  AND token = '3G0HSQS1otd1ZGZfp/OS79bPuEihopJiTUNouQv5a0c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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