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SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = 'aa073e7fe5cbb80f46cf8a72047b1da158abb9e162337b9ea4ab7aff3aece1a3' 
  AND token = 'ty/l5B8jYyb7G/rH8MichoxCeWKrniBATEx63yB69b8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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