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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07cc5cce4722010a48fe48412dd65ed8b4f4ec503cf753b0d79c3fe68cacb035' 
  AND token = 'PNptT2KRWtaIgE3YR50pFovw1ywwSpbDSVkO0lTlEEU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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