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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0172070011cbab41eaa418a60139d71481977f3a90a76fe843b7aa33f6ce31ca' 
  AND token = 'Df/V+xyfGWoS9gDTty/AfPcBKrGM9zcrq9v19qqz1n4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00057

JSON explain

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