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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '89064c65d964cdcdee9141bbd48e94e0ba7a26e4c32aa867261107d86aaad5a1' 
  AND token = 'gJxnMNZKfZaXTqKVsjqa0vW9Sa/BvA7cxS/GIRVaHAM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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