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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5f573999c3636498433425c1c62499f98371170102ac989ea83bca85fd446d2f' 
  AND token = 'H8V86mw2guYw1/M2a8i5vVxZ7yDSzh/A2j9rAt0kcf8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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