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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '29e5f1c109e0faf6d4a8e4c6064e17bea1e61cc335721e9c6793c110ef24b7fa' 
  AND token = 'DPINamKj1XYcDV2viTOM+UFZKgCgXVy343L3NAL2H+M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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