SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a1e97e6771f3664ccf9cc0549da6a5ff42d6e7e126f533d9e28a6bcafcce9583' 
  AND token = 'TKHwYw68XIgrnOOm5p/lxqH9Cv3w0MEMohRQ3ZEbZV4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}