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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0692b3637cdcba7c52b957c4fe3778c2188b10578e332bb6cf659299a7916de7' 
  AND token = 'NXlFEeOR/vNYf5COcus7Hutqe9exEmfjbBVKJP+pJEc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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