Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '66c6aa01a73c12f20cc0d58a67a8d976d65adf7146e8e7b594c239f2e6b604a9' 
  AND token = 'hqhxY75TcJtM3OGd4k1OKIRTJiMeyvhOpdgR8YxaNdQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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