SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9072a862501112a775e19e5d48d5d5205c167685ccfdc76adbd975238f04c89e' 
  AND token = '8AI4SJvfKbv3/m/Q6YxXAMt1qpDnzY0MQgtoVfiBEGE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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