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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b65aaf6f07f35fc5520a7289a05ab9fe299f0b5edc652f3b98a8daf71332b1a0' 
  AND token = '5iW1HIqeY05pmdryCX7O92jdBIDETk48NWKHK2abmOs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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