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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4bd28c1cd9be4b34e2b6a5aaaa7f0ac824614f560780cabfcbacae9450f052cb' 
  AND token = 'EAfxFv+m7ezBoqqwbORFdPe2u8nW3iJH/GNP8/9DLnQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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