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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '57db6baeaa476e875a6fd53218196bc030fd72b1f9b5658cc567d52dbf6c7d59' 
  AND token = 'pkmSTr3cen4ZbCaULyEwbpSBxAD26KcMI2qoXHslpYo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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