Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd0148c05145ddefd63fad680c9654893bb24eb083e548690bcb2dc14d9088546' 
  AND token = 'B/2uOnAxouuuIW+NDxQSdpw3X55pBihF9TyzWjR1kRE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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