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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4e2622061a4a7c574d0e948bd5fc31254048fcc7f8aab7194a1c7cf66a7d4a1a' 
  AND token = 'apQTZonH1sNl71w4G23dMSURJjgkbvta6K2Inx9mFIw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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