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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'babfc50621d3a43539a2bdf1ea8ede29e335e4c87ee29fce25b733a08aa57aaf' 
  AND token = 'GhJQXsMzzPeNINoTFBOEEynQxO1O4dQqFl3+3h3k/0k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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